Rotary cement-kiln.



No. 778,611. PATENTED DEC. 27, 1904.

G. H. SHARP.

ROTARY CEMENT KILN.

APPLICATION FILED JUNE 24.1904.

2 SHEETSSHEET 1.

No. 778,611. PATENTED DEC. 27, 1904.

G. H. SHARP.

ROTARY CEMENT KILN.

APPLICATION FILED JUNE 24,1904.

2 SHEETS-SHEET 2.

Fly. 2.

T/WTNE'SSES UNITED STATES Patented December 27, 1904.

GEORGE H. SHARP, OF JONESVILLE, MICHIGAN.

ROTARY CEIVIENT-KILN.

SPECIFICATION forming part of Letters Patent No. 778,611, dated December 27, 1904, Application filed June 24, 1904. Serial No. 214,010-

To aZZ whom, it may concern:

Be itknown that I, GEORGE H. SHARP, acitizen of the United States,residing at Jonesville, in the county of Hillsdale and State of Michigan, have invented certain new and useful Improvements in Rotary Cement-Kilns; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to improvements in apparatus for drying the materials used in the manufacture of Portland cement or other wet materials of like character.

It has for its object to utilize the waste gases in an internally-heated rotary Portland-cement kiln or other cylindric drier.

To this end the invention consists of the details of construction and combination of parts hereinafter described, and more particularly pointed out in the claims concluding this specification.

In the accompanying drawings, illustrating the preferred embodiment of my invention, Figure 1 is a side'elevation of an internallyheated rotary Portland-cement kiln or other cylindric drier, showing the rear or feed end in longitudinal section; and Fig. 2 is a crosssection of the rear or feed end, showing the concentrically-arranged cylinders with the shelving attached.

Referring more particularly to the drawings, A is the casing or outer cylinder of an internally-heated rotary Portland-cement kiln or other cylindric drier, to which inner concentrically-arranged cylinders C and D are securely attached by bolts E passing through sleeves or columns F. Said cylinders O and D are joined together in funnel-shaped telescoping segments, which may be as numerous as conditions may require. The larger ends of said segments fit over the smaller ends of the next adjoining segment, as at G, in the opposite direction from that in which the material to be dried is delivered to the kiln or drier. The joints are madeto allow for expansion and contraction. Shelving H (shown in Fig; 2) is attached to the inside and outside of the cylinders C and D and to the inside of cylinder A,

said shelving having their extremities turned up at approximately right angles thereto, as shown, so that the particles of the material to be dried will collect in said shelving and be carried part of the Way around with the cylinders. Said shelving also serves the purpose of more thoroughly separating the raw material by elevating and cascading it through the currents of hot waste gases.

In the rear or feed ends of the cylinders C and D are retaining-rings J to insure a complete separation of the material being supplied for drying or retaining it in said cylinders at the feed end and preventing any from falling back into the space between the cylinders D and A. The material is fed to each of the cylinders by a pipe K, having openings 1, 2, and 3 adapted to feed into the ends of the cylinders A, O, and D, respectively.

I am aware that changes may be made in my invention without departing from the spirit or sacrificing the advantages thereof. I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

Having thus described my invention, what .1 claim as new, and desire to secure by Letters Patent, is

1. In a device of the character described, the combination with an outer casing mounted upon rollers, of cylinders having shelving attached thereto arranged concentrically Within said casing, a feed-pipe extending into the ends of said cylinders and said casing and having perforations arranged at intervals therein adapted to feed the material separately to said cylinders and said casing, and means to rotate said casing.

2. In a device of the character described, the combination with an outer casing adapted to be rotated, of a cylinder arranged within, and secured to, said casing, said cylinder havinginwardly and outwardly projecting shelving attached thereto and said casing having inwardly-projecting shelving, means to feed material separately to said casing and cylinder, and means to rotate said casing.

3. In a device of the character described, the combination with an outer casing adapted to be rotated, of a cylinder arranged within, and secured to, said casing, said cylinder having inwardly and outwardly projecting shelving attached thereto, and said casing having inwardly-projecting shelving, said shelving having its end turned upward at about right angles thereto, means to feed material to the casing and cylinder, and means to rotate the casing.

4. In a device of the character described, the combination with a casing adapted to be rotated, of cylinders arranged concentrically within, and secured to, said casing, said cylinders having inwardly and outwardly pro jecting shelving attached thereto, and said casing having inwardly-projecting shelving, retaining-rings arranged in the, ends of each of said cylinders, means to feed material separately to the casing and cylinders, and means to rotate the casing.

In testimony whereof I aflix my signature in presence of two witnesses.

GEORGE H. SHARP. Witnesses:

CHAS. F. WADE, L. W. SIBBALD. 

